| 摘要 |
PURPOSE:To make a corner registration possible, by displacing a mirror and a lens in the direction orthogonal to the optical axis also in case of the change of magnifications. CONSTITUTION:A gear of a driving system is switched to change the scanning speed of a mirror, and a lens 1 is moved in the direction of the optical axis (B D) to convert magnifications. For the purpose of matching corners of an original to specific corners of a platen glass to position the original, the lens 1 is moved in the direction orthogonal to the original axis also by DELTAX. That is, the lens 1 is displaced along the direction inclined at an angle theta to the optical axis. The mirror is displaced in the direction orthogonal to the optical axis also in accordance with this movement of the lens 1 to prevent the deviation between the center of the mirror and the optical axis of the lens. |
